Hi,
This is made on purpose so that the customer can check that the price of the options is added to the base price of the product.
There is no option to display both base price and with with options with the same value.
Doing this would require modifying the javascript code in the product / option view file.
I think the simplest would be to change the line:
var target = d.getElementById("hikashop_product_price_with_options_main");
to:
var target = d.querySelector(".hikashop_product_price_full");
This way, the main price area would display the price with options and the price with options area wouldn't appear.